Rate‐Dependent AV Delay Optimization in Cardiac Resynchronization Therapy

Rate-dependent AV delay optimization in cardiac resynchronization therapy.

BACKGROUND During cardiac resynchronization therapy (CRT), cardiac performance is dependent on an optimized atrioventricular delay (AVD). However, the optimal AVD at different heart rates has not been defined yet during CRT. METHOD The effects of an increase in heart rate by pacing or physical exercise on optimal AVD were studied in 36 patients with biventricular pacemakers/defibrillators. Th...

Primary Results From the SmartDelay Determined AV Optimization: A Comparison to Other AV Delay Methods Used in Cardiac Resynchronization Therapy

Primary results from the SmartDelay determined AV optimization: a comparison to other AV delay methods used in cardiac resynchronization therapy (SMART-AV) trial: a randomized trial comparing empirical, echocardiography-guided, and algorithmic atrioventricular delay programming in cardiac resynchronization therapy.

BACKGROUND one variable that may influence cardiac resynchronization therapy response is the programmed atrioventricular (AV) delay. The SmartDelay determined av optimization: a comparison to other AV delay methods used in cardiac resynchronization therapy (SMART-AV) trial prospectively randomized patients to a fixed empirical AV delay (120 milliseconds), echocardiographically optimized AV dela...

Should we use the rate-adaptive AV delay in cardiac resynchronization therapy-pacing?

AIMS Recommendations for programming the rate-adaptive AV delay in CRT. METHODS AND RESULTS In cases of continual biventricular pacing, the optimal AV delay in CRT (AVD(opt)) is the net effect of the pacemaker-related interatrial conduction time (IACT), duration of the left-atrial electromechanical action (LA-EAC(long)), and the duration of the left-ventricular latency period (S(V)-EAC(short)...

Whether noninvasive optimization of AV and VV delays improves the response to cardiac resynchronization therapy.

BACKGROUND Device optimization is not routinely performed in patients who underwent cardiac resynchronization therapy (CRT) device implantation. Noninvasive optimization of CRT devices by measurement of cardiac output (CO) can be used as a simple method to assess ventricular systolic performance. The aim of this study was to assess whether optimization of atrioventricular (AV) and interventricu...